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公开(公告)号：US1766052A
公开(公告)日：1930-06-24
申请号：US21102727
申请日：1927-08-06
Applicant: EMMA A BETTIN
Inventor： BETTIN JOHN A
IPC: B65G17/12
CPC classification number: B65G17/123 , B65G2201/04
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